Patrick kelly



(No Model.)

RKBLLY. DRIFT COLUMN 0R SUPPORT FOR ROCK DRILLS.`

Patented 8811.17, 1888.-

.' INVENTUH La, .f

ATTORNEY NITED STATES PATENT Fries.

PATRICK KELLY, YOF POUGHKEEPSIE, ASSIGNOR TO ADDISON C. RAND, F

' NEW YORK, N. Y. n 1

DRIFT COLUMN 0R SUPPORT FOR ROCK-DRILL'S.

i SPECIFICATION forming part of LettersPatent No. 376,659, dated January17, 1888.

` Application tiled December 14, 1886. Serial No. 221,575. (No model.)

To all whom it may concern:

Beit known that I, PATRICK KELLY, a resident of the city ot'Poughkeepsie, county of .'Dutchess, State of New York, have inventedcertain new and useful Improvements in Drift Columns or Supports forRocl-Drills, of which the following is a specification. v

My invention relates to the class of columns or devices employed indrifts, tunnels, head-y ings, or other similar localities for supportingrock-drills.

My invention relates more particularly t0 the adjustable supportsarranged on the column, and which serve as bearings for arms supportingthe drills.

The object of my invention is to allow for greater freedom of motion andmore ready adjustment of the arms supporting the drills than "heretoforehas been possible in any similar devices of which I am aware,and,further,

to facilitate the removal of the arms and drills when preparing for ablast 0r a change in the position of the column is desired.

In the accompanying drawings, which illustrate my invention, similarletters of reference indicate like parts.

Figure 'I is a side elevation in perspective, representing a column andarm constructed according to my invention, and likewise showing onehub'bearing for an arm with the arm face-plate removed. Fig. 2 is adetached View,v

in perspective, of the three-part hub, such as serves to support aradial arm. Fig. 3 is a vcrtical section of the same on the line x x ofFig. 2 and shows the location of the clampingy bolts in the hub. Fig. 4is a detached view,

in perspective, of one ot' the arms and shows the arrangement of theclainpingseat for the drill-carriage.

In the drawings, A indicates a tubular metallic column, made lextensibleby means of the jack-screws B, located'in threaded holes on oppositesides of the block C at the base of the column, and provided withtransverse holes D for the insertionot' the bars used toturn thejack-screws.

Eis a three-part hub bored vertically to receive' the colu mn andhorizontally to receive a tangential arm, S, which may be tubular orsolid. The construction of this hub is shown in detail in.Figs.'2 and 3,E indicating the` y central or body portion, F the column face-v plate,and G the arm face-plate: The column` face-plate F is adapted to beYsecured to the part E by means of the bolts H, which have their headscountersunk in the horizontal bore ofthe hub. The plate G is likewisesecured by bolts I, the heads of whichare similarly ycountersunk in thevertical boring of the hub.

tangential arm and allowing for its horizontal 7o i adjustment androtation in its bearing in the hub.

In order to more effectual] y secure the hub in any desired positionupon the column,

I provide the safety clampingring J, madenin two parts and adapted to bedrawn together with the tighteningnuts K.

The drawings represent -the column as provided with but onearm, Vbutwith a secondI hub with the arm face-plate G removed.

'It will-be obvious ythat withV the faceplate restored to its position asecond arm can be secured upon the column.

It will be understoodl that by removing or loosening the nuts on the endofthe bolts I the f face-plate G can be removed or so loosened as torelease its grasp upon the arm, thus allowing for its ready removal.`

Upon the end of the arm S is arranged the clam pin g-scat T for thedrill-cylinder carriage 9o W. This clamping-seat device is substantiallysimilar to that described in United States Let, ters Patent No. 264,524,and granted to Joseph C. Gethens, September 19, 1884, and it is notnecessary to describe its construction in this 9'5 specification, theonly difference between that shown in the-drawings and that describedin` the patent aforesaid being that thebody or seat of the clamp in thepresent instance is formed integrally with the arm, the seat for rco thedrill-carriage occupying a plane preferably below the level of the topof the arm.

X is the nut on the end of the clampingbolt Y of the drill-seat.

I do not wish to limit myself, however, to the specific construction ofthe clamp or of the seat for the carriage, as I may find it desirable touse a different clamp or to modify it in variousways; neither do I wishto be limited to a three-part hub, as I may find it convenient todecrease the number of parts or otherwise alter its formwhile stillpreserving its function.

I claim as my inventionl. A tubular column for the support ofrockdrills, provided with an extension screw or screws in the endthereof, and a three-part split hub on said columnA bored vertically andhorizontally and provided with threaded bolts and nuts, the heads ofsaid bolts countersunk in the respective tubular'bearings.

2. The combination, with the column Aand horizontal arm S, of adrill-clamp on the arm and a coupling adjustable vertically on thecolumn and comprising a horizontal sleeve wherein said arm is held andin which the arm may be adjusted lengthwise, substantially as described.

3. The combination, with the column A and thearm S, of the couplinghaving the divided sleeve, with their axes at substantially right anglestoeach other, and composed of the eenter piece, E, having formed in itsopposite sides semicireularportions of the sleeves and having recessesfor the boltheads, and cappieces F and G and bolts I, securing the saidcap-pieces and having their heads received in said recesses,substantially as described.

In testimony whereof I have hereunto subscribed my name this 27th day ofNovember, A. D. 1886.

PATRICK KELLY.

Vitnesses:

GEO. H. BENJAMIN, V. M. BRASCHI.

